Method for producing a ceramic matrix composite component
A method of producing a ceramic matrix composite material component is provided. The method includes that steps of: a) producing a preform having one or more ceramic constituents, the preform being porous with internal voids; and b) applying at least one layer of a first material to the preform using an atomic layer deposition (ALD) process to decrease a porosity of the preform.
1. A method of producing a ceramic matrix composite material component, comprising:
producing a preform having a ceramic matrix material interspersed within a fiber structure by subjecting the fiber structure, comprising one or more fibrous bundles, to a slurry including ceramic matrix particles, the one or more fibrous bundles having an intra-bundle porosity such that the preform is porous with internal voids;
applying at least one layer of a first material to the ceramic matrix material of the preform using an atomic layer deposition (ALD) process, subsequent to the step of producing the preform having the ceramic matrix material interspersed within the fiber structure by subjecting the fiber structure to the slurry, to decrease a porosity of the preform by decreasing the intra-bundle porosity of the one or more fibrous bundles;
applying one or more layers of a second material to the preform, subsequent to the ALD process, using a deposition process that deposits the second material in a non-self-limiting process comprising at least one of a chemical vapor infiltration process, a chemical vapor deposition process, or a polymer infiltration and pyrolysis process; and
applying at least one layer of a third material to the preform using said ALD process, subsequent to the step of applying the one or more layers of the second material to the preform using the deposition process, to decrease the porosity of the preform by filling voids created during the deposition process,
wherein the ceramic matrix material includes one or more ceramic precursor constituents,
the method further comprising applying one or more thermal treatments to the preform subsequent to the step of producing the preform and before the step of applying the at least one layer of the first material to the preform using the ALD process,
wherein applying the one or more thermal treatments to the preform converts the one or more ceramic precursor constituents into a ceramic form.
2. A method of producing a ceramic matrix composite (CMC) component, comprising:
providing a preform having a ceramic matrix material interspersed within a fiber structure, the fiber structure including one or more fibrous bundles having an intra-bundle porosity such that the preform is porous with internal voids;
applying at least one layer of a first material to the ceramic matrix material of the preform, subsequent to the step of providing the preform having the ceramic matrix material interspersed within the fiber structure, wherein the at least one layer of a first material is applied using an atomic layer deposition (ALD) process to decrease a porosity of the preform;
applying one or more layers of a second material to the preform after the at least one layer of the first material is applied, using a deposition process that deposits the second material in a non-self-limiting process comprising at least one of a chemical vapor infiltration process, a chemical vapor deposition process, or a polymer infiltration and pyrolysis process; and
applying at least one layer of a third material to the preform using said ALD process, wherein the at least one layer of the third material is applied to the preform after the one or more layers of the second material are applied to the preform,
wherein the ceramic matrix material includes one or more ceramic precursor constituents,
the method further comprising applying one or more thermal treatments to the preform subsequent to the step of providing the preform and before the step of applying the at least one layer of the first material to the preform using the ALD process,
wherein applying the one or more thermal treatments to the preform converts the one or more ceramic precursor constituents into a ceramic form.